Acrobat won’t open “Attempt to access invalid address”

We had a user that suddenly couldn’t open any local or networked PDF files. I uninstalled, ran CCleaner, Adobe’s after acrobat cleaner, restarted the machine, and finally re-installed Acrobat. Same error came up.

This issue was solved by uninstalling EMET 5.1. Not really what I wanted to do but the user had to get work done.